docs: def expand(self, url):
          """Expand implementation for Bit.ly
          Args:
              url: the URL you want to shorten
  
          Returns:
              A string containing the expanded URL
  
          Raises:
              ExpandingErrorException: If the API Returns an error as response
          """
          expand_url = f'{self.api_url}v3/expand'
          params = {
              'shortUrl': url,
              'access_token': self.api_key,
              'format': 'txt',
          }
          response = self._get(expand_url, params=params)
          if response.ok:
              return response.text.strip()
          raise ExpandingErrorException(response.content)